Please refer to the following art to answer the following questions.
-Examine the structure of blood vessels in the following figure.Which one of the following has the structure best suited to chemical exchange between the blood and tissues? 
Definitions:
Equal Size
A description of two or more entities having the same dimensions, capacity, volume, or numerical value.
Long-Term Projects
Initiatives or endeavors that require an extended period to complete, typically involving complex tasks and significant planning.
Concentrate
To focus one's attention or mental effort on a specific object, task, or activity.
Territory
An area that is defended by an individual or group against others, often associated with animal behavior, but also applicable in human contexts.
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